Prepare popcorn according to package directions.  Remove all unpopped kernels.  Place popped corn in large bowl sprayed with cooking spray; set aside

Heat corn syrup in small saucepan over medium-high heat; bring to boil and boil 3 minutes.  Remove from heat and stir in peanut butter.  Pour mixture over popped corn; tossing gently to coat evenly.  Let cool about 5 minutes.

Spray hands with cooking spray.  Gently roll popcorn mixture into one inch balls.  Press thumb firmly into center of each ball to make indention for candy insert.  Place 1 piece of candy in center of each cookie.  Best served same day